An action on a mortgage deed may be brought against a person in possession of the mortgaged premises. The mortgagor or person claiming under him may, in all cases, be joined with him as a cotenant, whether he then has any interest or not in the premises, but he is not liable for costs when he has no such interest and makes his disclaimer thereto upon the records of the court.
The provisions of this chapter shall be construed to apply to and affect only public utilities which furnish products or services within the state, and this chapter shall not be construed to extend to any public utility engaged in interstate commerce the government or regulation of which jurisdiction is vested in the interstate commerce commission or other federal board or commission.